WO2021047494A1 - Ensemble couvercle supérieur, batterie secondaire et dispositif électrique - Google Patents

Ensemble couvercle supérieur, batterie secondaire et dispositif électrique Download PDF

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Publication number
WO2021047494A1
WO2021047494A1 PCT/CN2020/113946 CN2020113946W WO2021047494A1 WO 2021047494 A1 WO2021047494 A1 WO 2021047494A1 CN 2020113946 W CN2020113946 W CN 2020113946W WO 2021047494 A1 WO2021047494 A1 WO 2021047494A1
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WO
WIPO (PCT)
Prior art keywords
sealing
top cover
section
hole section
cover plate
Prior art date
Application number
PCT/CN2020/113946
Other languages
English (en)
Chinese (zh)
Inventor
陈新祥
黄守君
苏华圣
郑于炼
李想
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to CN202080013259.3A priority Critical patent/CN113412553A/zh
Priority to EP20864096.1A priority patent/EP3944405B1/fr
Priority to FIEP20864096.1T priority patent/FI3944405T3/fi
Priority to PL20864096.1T priority patent/PL3944405T3/pl
Priority to ES20864096T priority patent/ES2967894T3/es
Publication of WO2021047494A1 publication Critical patent/WO2021047494A1/fr
Priority to US17/505,753 priority patent/US20220045392A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/155—Lids or covers characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/155—Lids or covers characterised by the material
    • H01M50/157—Inorganic material
    • H01M50/159—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • This application relates to the technical field of energy storage devices, in particular to a top cover assembly, a secondary battery and an electrical device.
  • the secondary battery includes a top cover assembly, a casing and an electrode assembly.
  • the electrode assembly is contained in the casing.
  • the top cover assembly is installed on the top of the casing and is electrically connected to the electrode assembly so that the electric energy of the electrode assembly passes through the pole on the top cover assembly. Lead out to the outside of the shell.
  • Mounting holes are provided on the top cover plate. Normally, the pole is sealed in the mounting hole through a sealing ring to ensure the tightness between the top cover plate and the pole.
  • a sealing ring to ensure the tightness between the top cover plate and the pole.
  • the embodiments of the present application provide a top cover assembly, a secondary battery, and an electrical device to improve the convenience of installation of the sealing ring.
  • top cover assembly which includes:
  • the top cover plate is provided with a mounting hole, the mounting hole includes a sealed hole section; the pole is inserted into the mounting hole, the pole includes a sealed shaft section, the sealed shaft section is inserted into the sealed hole section, and the side wall of the sealed hole section is sealed
  • the side walls of the shaft section are all inclined with respect to the axis of the mounting hole; the sealing ring is arranged between the side wall of the sealing hole section and the side wall of the sealing shaft section.
  • the side walls of the sealing hole section and the side walls of the sealing shaft section are both inclined with respect to the axis of the mounting hole, so that the sealing hole section and the sealing shaft section are in a structure with a small top and a large bottom or a small top and bottom, so that when the pole is installed along the
  • the distance between the side wall of the sealing hole section and the side wall of the sealing shaft section gradually decreases, and the sealing ring is squeezed in the direction perpendicular to the side wall until the sealing ring is installed in place. It is convenient to install, and can effectively avoid displacement or damage of the sealing ring during the installation of the pole.
  • the side walls of the sealing hole section and the side walls of the sealing shaft section are both inclined in a direction close to the axis of the mounting hole.
  • the sealing hole section and the sealing shaft section have a small top and a large bottom.
  • the bottom end of the sealing hole section and the sealing shaft section is the end with a larger diameter, and the top is the end with a smaller diameter.
  • the pole is inserted into the mounting hole from bottom to top. Inside, the pole is fixed on the top of the top cover plate to make the installation and fixation of the pole more convenient.
  • the angle at which the side wall of the sealing hole section and the side wall of the sealing shaft section are inclined with respect to the axis of the mounting hole is 5° ⁇ 45°.
  • the inclined angle ⁇ is between 5° and 45°, which can facilitate the installation of the sealing ring , And can ensure the reliability of the sealing ring seal.
  • the distance between the side wall of the sealing hole section and the side wall of the sealing shaft section is the same everywhere.
  • the distance between the sealing hole section and the sealing shaft section in the radial direction of the mounting hole is the same, so that a uniform installation gap is formed between the sealing hole section and the sealing shaft section.
  • the generatrix of the sealed hole section and the generatrix of the sealed shaft section are both straight lines, and the generatrix of the sealed hole section is parallel to the generatrix of the sealed shaft section.
  • the generatrix of the sealed hole section and the generatrix of the sealed shaft section are both straight lines. Accordingly, the sealed hole section is a truncated cone-shaped hole, and the sealed shaft section is a truncated cone-shaped shaft, which facilitates the sealing of the hole section and the sealed shaft section.
  • the processing improves the convenience of processing.
  • the sealing ring When the sealing ring is arranged between the side wall of the sealing hole section and the side wall of the sealing shaft section, the sealing ring can be compressed uniformly to ensure the sealing effect of the sealing ring.
  • the top cover assembly provided in the present application further includes a first insulating member and a second insulating member, the first insulating member and the second insulating member are respectively located on both sides of the top cover plate; the first insulating member and the second insulating member Parts, the side walls of the sealing hole section and the side walls of the sealing shaft section form a sealed cavity, and the sealing ring is located in the sealed cavity.
  • first insulating member, the second insulating member, the side walls of the sealing hole section and the side wall of the sealing shaft section form a sealed cavity, and the sealing ring is located in the sealed cavity.
  • the two ends of the axial direction limit the sealing ring to prevent the pole from being inserted into the mounting hole to squeeze the sealing ring.
  • the sealing ring slips off along the end of the sealing hole section, which affects the sealing ring and the sealing hole section, as well as the sealing ring and seal.
  • the effective contact area of the shaft section improves the reliability of the seal.
  • the thickness of the sealing ring is less than or equal to the thickness of the top cover plate.
  • the sealing ring can be fully compressed, the effective utilization rate of the sealing ring can be improved, the overall thickness of the top cover assembly can be reduced, and the energy of the secondary battery can be increased. density.
  • a gap is left at at least one corner of the sealing ring and the sealing cavity.
  • the gap can release the elastic restoring force of the sealing ring, thereby avoiding damage to the sealing ring under the action of excessive pressing force.
  • the first insulating member is disposed at the end of the mounting hole with a smaller diameter; the mounting hole further includes a limiting hole section, the limiting hole section is disposed at the end of the sealing hole section facing the first insulating member and communicates with the sealing hole. Hole section; the first insulating member is provided with a limiting protrusion, which is located between the limiting hole section and the pole.
  • an obtuse angle is formed between the inner wall of the sealing hole section and the inner wall of the limiting hole section, effectively preventing the edge of the sealing hole section from being damaged and the sealing ring being scratched.
  • the first insulating member is provided with a limiting protrusion, which is located between the limiting hole section and the pole.
  • the limiting protrusion forms a reliable positioning and insulation between the top cover and the pole. Prevent the pole from shaking or short circuit with the top cover plate; on the other hand, ensure that the sealing ring is completely contained in the sealing hole section to form a reliable seal
  • the top cover plate is made of insulating material. In this way, the top cover plate can be insulated from the pole pole to prevent the pole pole and the top cover plate from being short-circuited, and the safety is improved.
  • the second aspect of the embodiments of the present application provides a secondary battery, which includes any one of the top cover components provided in the present application.
  • the secondary battery in this embodiment includes the above-mentioned top cover assembly, correspondingly, it also has the advantage of the top cover assembly, that is, the side wall of the sealing hole section and the side wall of the sealing shaft section are relative to the axis of the mounting hole.
  • the sealing hole section and the sealing shaft section have a structure with a small upper part and a lower part, so that when the pole is inserted into the mounting hole along the axial direction of the mounting hole, the side wall of the sealing hole section and the side of the sealing shaft section The distance between the walls is gradually reduced, and the sealing ring is squeezed in the direction perpendicular to the side wall until the sealing ring is installed in place, which is convenient for installation and can effectively avoid displacement or damage of the sealing ring during the installation of the pole.
  • the third aspect of the embodiments of the present application provides an electrical device, which includes the secondary battery provided in the present application, and the secondary battery is used to provide electrical energy.
  • the electrical device in this embodiment includes the above-mentioned top cover assembly, correspondingly, it also has the advantage of the top cover assembly, that is, the side wall of the sealing hole section and the side wall of the sealing shaft section are relative to the axis of the mounting hole.
  • the sealing hole section and the sealing shaft section have a structure with a small upper part and a lower part, so that when the pole is inserted into the mounting hole along the axial direction of the mounting hole, the side wall of the sealing hole section and the side of the sealing shaft section The distance between the walls is gradually reduced, and the sealing ring is squeezed in a direction perpendicular to the side wall until the sealing ring is installed in place, which is convenient for installation and can effectively avoid displacement or damage of the sealing ring during the installation of the pole.
  • FIG. 1 is a schematic structural diagram of a secondary battery provided by an embodiment of the application.
  • FIG. 2 is a schematic diagram of an exploded structure of a secondary battery provided by an embodiment of the application.
  • FIG. 3 is a schematic diagram of an exploded structure of a top cover assembly provided by an embodiment of the application.
  • FIG. 4 is a schematic cross-sectional structure diagram of a top cover assembly provided by an embodiment of the application.
  • Figure 5 is a partial enlarged view of Figure 4.
  • Fig. 6 is a partial structural diagram of the top cover plate in Fig. 5;
  • FIG. 7 is a schematic diagram of the structure of the pole in FIG. 5;
  • Fig. 8 is a schematic diagram of the matching structure of the top cover plate and the pole in Fig. 5;
  • FIG. 9 is a schematic diagram of the matching structure of the top cover plate, the pole, the first insulating member and the second insulating member in FIG. 5;
  • FIG. 10 is a schematic diagram of a partial structure of the first insulating member in FIG. 5.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; unless otherwise stipulated or stated
  • the term “multiple” refers to two or more; the terms “connected” and “fixed” should be understood in a broad sense.
  • “connected” can be a fixed connection, a detachable connection, or an integral Connection, or electrical connection; it can be directly connected or indirectly connected through an intermediate medium.
  • connection can be a fixed connection, a detachable connection, or an integral Connection, or electrical connection; it can be directly connected or indirectly connected through an intermediate medium.
  • the cross section of the sealing ring is L-shaped (hereinafter referred to as "L-shaped sealing ring"), and the upper half of the L-shaped sealing ring (ie, "L"-shaped The vertical arm part) extends into the mounting hole, the lower part (ie, the "L"-shaped bottom arm part) is located on one side of the thickness direction of the top cover plate, and the L-shaped sealing ring depends on the force of the secondary battery in the height direction Squeeze the lower part of the sealing ring to seal.
  • L-shaped sealing ring usually the cross section of the sealing ring is L-shaped (hereinafter referred to as "L-shaped sealing ring"), and the upper half of the L-shaped sealing ring (ie, "L"-shaped The vertical arm part) extends into the mounting hole, the lower part (ie, the "L"-shaped bottom arm part) is located on one side of the thickness direction of the top cover plate, and the L-shaped sealing ring depends on the force of the secondary battery in the height direction Squeeze
  • the lower half of the L-shaped sealing ring is located on one side of the top cover plate, which occupies the space in the height direction, resulting in a decrease in the energy density of the secondary battery.
  • an embodiment of the present application provides a secondary battery, which includes a top cover assembly 1, a casing 2 and an electrode assembly 3.
  • the housing 2 can be a hexahedron shape or other shapes, and the housing 2 forms a accommodating cavity for accommodating the electrode assembly 3 and the electrolyte.
  • One end of the housing 2 is open so that the electrode assembly 3 can pass through the housing 2
  • the opening is placed in the accommodating cavity of the housing 2, and a plurality of electrode assemblies 3 can be arranged in the accommodating cavity, and the plurality of electrode assemblies 3 are stacked on each other.
  • the housing 2 may include a metal material, such as aluminum or aluminum alloy, etc., or an insulating material, such as plastic, etc.; when the housing 2 includes a metal material, an insulating film 4 may be provided in the housing 2.
  • the electrode assembly includes an electrode unit and tabs.
  • the tabs can be arranged at the two ends of the electrode unit or on the top of the electrode unit at intervals.
  • the electrode unit includes a positive pole piece, a negative pole piece and a separation membrane. The separation membrane is located between the adjacent positive pole piece and the negative pole piece and is used to separate the positive pole piece and the negative pole piece.
  • the positive pole piece, the separator and the negative pole piece are sequentially stacked and wound to form the electrode unit of the electrode assembly 3, that is, the electrode unit has a wound structure; in another possible In the design, the positive pole piece, the isolation film and the negative pole piece are sequentially stacked to form the electrode unit of the electrode assembly, and the electrode unit is a laminated structure. At the same time, the electrode unit has a gap after being formed, and the electrolyte can enter the electrode unit through the gap and infiltrate the positive pole piece and the negative pole piece.
  • the positive electrode piece includes a positive electrode current collector (such as aluminum foil) and a positive electrode active material layer (such as a ternary material, lithium iron phosphate or lithium cobalt oxide) coated on the surface of the positive electrode current collector
  • the negative electrode piece includes a negative electrode current collector (such as Copper foil) and a negative active material layer (such as graphite, carbon or silicon) coated on the surface of the negative current collector.
  • the tab is connected to the positive pole piece and extends from the electrode unit, and the tab can be directly cut from the positive current collector; on the negative pole of the electrode assembly 3, the tab and the negative pole
  • the pieces are connected and extend from the electrode unit, and the tabs can be directly formed by cutting the negative electrode current collector.
  • the top cover assembly 1 provided by the embodiment of the present application includes a top cover plate 10, a pole 11 and a sealing ring 12.
  • the top cover plate 10 is fixed to the opening of the housing 2, the length direction of the top cover plate 10 is the X direction shown in FIG. 4, and the thickness direction of the top cover plate 10 is the Y direction shown in FIG. 4.
  • the top cover plate 10 is provided with an explosion-proof valve 17 and an explosion-proof valve patch 18 to seal the electrode assembly and electrolyte in the containing cavity of the housing 2.
  • the top cover plate 10 is also provided with a liquid injection hole 19 to inject the electrolyte into the housing Inside the accommodating cavity of the body 2.
  • the top cover plate 10 is provided with a mounting hole 100, and the mounting hole 100 penetrates the top cover plate 10 along the thickness direction (Y direction) of the top cover plate 10; the pole 11 is inserted into the mounting hole 100 and sealedly connected in the mounting hole 100,
  • the pole 11 can be riveted to the top cover plate 10 via a terminal plate 15; the pole 11 includes a positive pole and a negative pole, and the two poles 11 are electrically connected to the corresponding pole lugs through an adapter piece 16.
  • the adapter piece 16 includes a positive electrode adapter piece and a negative electrode adapter piece.
  • the mounting hole 100 includes a sealing hole section 100a
  • the pole 11 includes a sealing shaft section 110
  • the sealing shaft section 110 is inserted into the sealing hole section 100a
  • the side walls of the sealing hole section 100a and the sealing shaft section 110 are opposite to the mounting hole
  • the axis of 100 is inclined, a gap is provided between the sealing hole section 100a and the sealing shaft section 110, and the sealing ring 12 is arranged between the side wall of the sealing hole section 100a and the side wall of the sealing shaft section 110, that is, the sealing ring 12 Set in the above-mentioned gap.
  • the sealing ring 12 is inserted into the mounting hole 100 along the larger diameter end of the mounting hole 100, and the smaller diameter end of the pole 11 is first inserted into the inner ring of the sealing ring 12, thereby positioning the sealing ring 12 in the sealing hole section 100a and the sealing shaft section 110; when the pole 11 is inserted into the mounting hole 100 along the axial direction of the mounting hole 100, the distance between the side wall of the sealing hole section 100a and the side wall of the sealing shaft section 110 gradually decreases. The direction perpendicular to the side wall squeezes the sealing ring 12 until the sealing ring 12 is installed in place, which is convenient for installation and can effectively avoid displacement or damage of the sealing ring 12 during the installation process of the pole 11.
  • the sealing ring 12 can be more squeezed and a reliable seal can be realized.
  • the side walls of the sealing hole section 100a and the side walls of the sealing shaft section 110 are inclined with respect to the axis of the mounting hole 100, which means that along the thickness direction of the top cover plate 10, the aperture size of the sealing hole section 100a gradually changes ,
  • the shaft diameter of the sealing shaft section 110 gradually changes, so that the sealing hole section 100a and the sealing shaft section 110 both present a structure with a large end and a small end.
  • the aperture of the sealing hole section 100a and the shaft diameter of the sealing shaft section 110 can be linearly changed, so that the generatrices of the sealing hole section 100a and the sealing shaft section 110 are both straight;
  • the aperture of the section 100a and the shaft diameter of the sealing shaft section 110 can also be changed non-linearly, so that the generatrix of the sealing hole section 100a and the generatrix of the sealing shaft section 110 are non-linear (such as a curve or a broken line).
  • the distance between the side wall of the sealing hole section 100a and the side wall of the sealing shaft section 110 is the same. That is to say, at any thickness position of the top cover plate 10, the distance between the sealing hole section 100a and the sealing shaft section 110 along the radial direction of the mounting hole 100 is the same.
  • the sealing hole section 100a and the sealing shaft section 110 are formed between Uniform installation clearance.
  • the sealing ring 12 is arranged between the side wall of the sealing hole section 100a and the side wall of the sealing shaft section 110. A uniform installation gap is formed between the sealing hole section 100a and the sealing shaft section 110, so that the sealing ring 12 can be compressed uniformly to ensure sealing effect.
  • the generatrix of the sealing hole section 100a and the generatrix of the sealing shaft section 110 are both straight lines, that is, the sealing hole section 100a is a truncated cone-shaped hole, and the sealing shaft section 110 It is a truncated cone-shaped shaft with simple structure and convenient processing; the generatrix of the sealing hole section 110a is parallel to the generatrix of the sealing shaft section 110, so that the sealing ring 12 can be uniformly compressed between the sealing hole section 110a and the sealing shaft section 110; When the pole 11 is inserted into the mounting hole 100 to squeeze the sealing ring 12, it can also facilitate the sealing ring 12 to move along the side wall, so that the sealing ring 12 slides along the smaller diameter end of the sealing hole section 100a and the sealing shaft section 110 to a smaller diameter. The larger end enables the sealing ring 12 to be fully compressed and increases the reliability of the seal.
  • the side walls of the sealing hole section 100a and the side walls of the sealing shaft section 110 are both inclined in the direction close to the axis of the mounting hole 100. That is to say, the sealing hole section 100a and the sealing shaft section 110 have a small top and a large bottom.
  • the bottom end of the sealing hole section 100a and the sealing shaft section 110 is the end with a larger diameter
  • the top end is the end with a smaller diameter
  • the pole 11 Install the pole 11 in the mounting hole 100 from bottom to top, and fix the pole 11 on the top of the top cover plate 10 to make the installation and fixation of the pole 11 more convenient.
  • the bottom end of the pole 11 needs to be connected to the adapter plate 16, and
  • the tabs 16 are connected to the tabs of the electrode assembly 3, and the poles 11 are inserted into the mounting holes 100 from bottom to top, which can prevent the tabs 16 from deforming or moving during the process of mounting and fixing the poles 11.
  • the sealing hole section 100a and the sealing shaft section 110 can also be arranged with a large upper and a smaller structure, so that the top end of the sealing hole section 100a and the sealing shaft section 110 is the end with a larger diameter, and the bottom end is the end with a smaller diameter.
  • the pole 11 is inserted into the mounting hole 100 from top to bottom.
  • the angle ⁇ at which the side wall of the sealing hole section 100a and the side wall of the sealing shaft section 110 are inclined with respect to the axis of the mounting hole 100 is 5° to 45°, which can facilitate the sealing ring
  • the installation of 12 can ensure the reliability of the sealing of the sealing ring 12.
  • the top cover assembly 1 provided in the embodiment of the present application further includes a first insulating member 13 and a second insulating member 14, and the first insulating member 13 and the second insulating member 14 are respectively Located on both sides of the top cover plate 10 along its own thickness direction, and is relatively fixed to the top cover plate 10; the first insulating member 13 and the second insulating member 14 are respectively provided with through holes allowing the pole 11 to pass through, and pass through the first The insulating member 13 and the second insulating member 14 fix the pole 11 to prevent the pole 11 from shaking in the mounting hole 100.
  • the top cover plate 10 is made of a metal material, and the first insulating member 13 and the second insulating member 14 can also achieve insulation between the pole 11 and the top cover plate 10, and prevent the pole 11 and the top The contact of the cover plate 10 is short-circuited.
  • the top cover plate 10 is made of insulating material, and the first insulating member 13 and the second insulating member 14 and the top cover plate 10 can be arranged as separate parts, or can be integrated with the top cover plate 10. forming.
  • the first insulating member 13, the second insulating member 14, the side wall of the sealing hole section 100a and the side wall of the sealing shaft section 110 form a sealed cavity 101, the sealing ring 12 is located in the sealed cavity 101, and the first insulating member 13 is insulated from the second insulating member.
  • the parts 14 respectively limit the sealing ring 12 along the two ends of the axial direction of the mounting hole 100 to prevent the pole 11 from being inserted into the mounting hole 100 to squeeze the sealing ring 12, and the sealing ring 12 slips off along the end of the sealing hole section 100a. , It affects the effective contact area of the sealing ring 12 and the sealing hole section 100a and the sealing ring 12 and the sealing shaft section 110, thereby improving the reliability of the seal.
  • the thickness of the sealing ring 12 is not greater than the thickness of the top cover plate 10, the top of the sealing ring 12 does not exceed the top of the top cover plate 10, and the bottom of the sealing ring 12 does not exceed the bottom of the top cover plate 10.
  • the sealing ring 12 is completely contained within the sealing hole section 100a.
  • the sealing ring 12 can be fully compressed, and the effective utilization rate of the sealing ring 12 can be improved, that is, the part of the sealing ring 12 beyond the sealing hole section 100a cannot be compressed or cannot be fully compressed, so that this part cannot have a sealing effect;
  • the overall thickness of the top cover assembly 1 can be reduced, and the energy density of the secondary battery can be improved.
  • a gap 102 is left at at least one top corner of the sealing ring 12 and the sealing cavity 101 (see FIG. 5).
  • the gap 102 can release the elastic restoring force of the sealing ring 12, thereby preventing the sealing ring 12 from being too large. Damage occurs under pressure.
  • the first insulating member 13 is arranged at the smaller diameter end of the sealing hole section 100a, that is, the first insulating member 13 is arranged at the smaller diameter end of the mounting hole 100; correspondingly, the second insulating member 14 is arranged at the sealing hole 100a.
  • the hole section 100a has the larger diameter end.
  • the mounting hole 100 also includes a limiting hole section 100b.
  • the limiting hole section 100b is arranged at an end of the sealing hole section 100a facing the first insulating member 13, and is connected to the sealing hole section 100a.
  • the sealing hole section 100a is eliminated by the limiting hole section 100b.
  • the inner wall of the smaller diameter end of the sealing hole section 100a forms a sharp edge with the surface of the top cover plate 10.
  • the acute angle of the sealing hole section 100a is likely to cause damage to the edge of the sealing hole section 100a or scratch the sealing ring 12.
  • the first insulating member 13 is provided with a limiting protrusion 130, which is located between the limiting hole section 100b and the pole 11 (the annular gap between the limiting hole section 100b and the pole 11);
  • the position protrusion 130 forms a reliable positioning and insulation between the top cover plate 10 and the pole 11 to prevent the pole 11 from shaking or short-circuit with the top cover plate 10; on the other hand, to ensure that the sealing ring 12 is completely contained in the sealing hole section 100a Within, a reliable seal is formed.
  • the embodiment of the present application also provides an electrical device, including the secondary battery in the above embodiment, and the secondary battery is used to provide electrical energy.
  • the electrical device can be a vehicle, for example, the vehicle can be a fuel car, a gas car or a new energy car, and the new energy car can be a pure electric car, a hybrid car, or a range-extended car.
  • electrical devices can also be other energy storage devices, such as mobile phones, portable devices, notebook computers, electric toys, power tools, ships, and spacecraft.
  • spacecraft can include airplanes, rockets, space shuttles, or spacecraft.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

L'invention concerne un ensemble couvercle supérieur, une batterie secondaire et un dispositif électrique. L'ensemble couvercle supérieur comprend une plaque de couvercle supérieure, des pôles et des bagues d'étanchéité, des trous de montage étant ménagés dans la plaque de couvercle supérieure ; les trous de montage comprennent des sections de trou d'étanchéité ; les pôles sont insérés dans les trous de montage ; les pôles comprennent des sections d'arbre d'étanchéité ; les sections d'arbre d'étanchéité sont insérées dans les sections de trou d'étanchéité ; des parois latérales des sections de trou d'étanchéité et des parois latérales des sections d'arbre d'étanchéité sont toutes inclinées par rapport aux axes des trous de montage ; et les bagues d'étanchéité sont disposées entre les parois latérales des sections de trou d'étanchéité et les parois latérales des sections d'arbre d'étanchéité.
PCT/CN2020/113946 2019-09-11 2020-09-08 Ensemble couvercle supérieur, batterie secondaire et dispositif électrique WO2021047494A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN202080013259.3A CN113412553A (zh) 2019-09-11 2020-09-08 顶盖组件、二次电池及用电装置
EP20864096.1A EP3944405B1 (fr) 2019-09-11 2020-09-08 Ensemble couvercle supérieur, batterie secondaire et dispositif électrique
FIEP20864096.1T FI3944405T3 (fi) 2019-09-11 2020-09-08 Päällikansikokoonpano, sekundääriakku ja sähkölaite
PL20864096.1T PL3944405T3 (pl) 2019-09-11 2020-09-08 Zespół osłony górnej, bateria wtórna i urządzenie elektryczne
ES20864096T ES2967894T3 (es) 2019-09-11 2020-09-08 Conjunto de cubierta superior, batería secundaria y dispositivo eléctrico
US17/505,753 US20220045392A1 (en) 2019-09-11 2021-10-20 Top cover assembly, secondary battery, and power consumption apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201921510303.2 2019-09-11
CN201921510303.2U CN210110860U (zh) 2019-09-11 2019-09-11 顶盖组件与二次电池

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/505,753 Continuation US20220045392A1 (en) 2019-09-11 2021-10-20 Top cover assembly, secondary battery, and power consumption apparatus

Publications (1)

Publication Number Publication Date
WO2021047494A1 true WO2021047494A1 (fr) 2021-03-18

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US (1) US20220045392A1 (fr)
EP (1) EP3944405B1 (fr)
CN (2) CN210110860U (fr)
ES (1) ES2967894T3 (fr)
FI (1) FI3944405T3 (fr)
HU (1) HUE064674T2 (fr)
PL (1) PL3944405T3 (fr)
WO (1) WO2021047494A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN210110860U (zh) * 2019-09-11 2020-02-21 宁德时代新能源科技股份有限公司 顶盖组件与二次电池
CN216671782U (zh) * 2021-11-30 2022-06-03 蜂巢能源科技有限公司 盖板组件及具有其的电池
CN116014317B (zh) * 2023-02-09 2023-06-27 深圳海润新能源科技有限公司 端盖组件、储能装置及用电设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009087729A (ja) * 2007-09-28 2009-04-23 Toshiba Corp 密閉型電池
CN201259901Y (zh) * 2008-08-25 2009-06-17 武汉银泰科技电源股份有限公司 一种铅酸蓄电池电池盖极柱孔
CN201975435U (zh) * 2010-09-26 2011-09-14 龚纹孝 电极引出密封结构
CN203150627U (zh) * 2013-01-18 2013-08-21 宁德新能源科技有限公司 动力电池顶盖及包含该顶盖的动力电池
CN210110860U (zh) * 2019-09-11 2020-02-21 宁德时代新能源科技股份有限公司 顶盖组件与二次电池

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112013004468T5 (de) * 2012-09-13 2015-06-03 Kabushiki Kaisha Toyota Jidoshokki Energiespeichervorrichtung
CN105940522B (zh) * 2014-01-29 2019-03-08 株式会社东芝 电池及封口体单元
CN104882573B (zh) * 2015-05-06 2017-11-21 中航锂电（洛阳）有限公司 动力电池盖板及使用该盖板的动力电池
CN209675395U (zh) * 2019-06-14 2019-11-22 宁德时代新能源科技股份有限公司 顶盖组件及二次电池
CN210743990U (zh) * 2019-06-27 2020-06-12 湖北金泉新材料有限责任公司 一种顶盖组件及包含其的电池
CN112310496A (zh) * 2020-04-09 2021-02-02 宁德时代新能源科技股份有限公司 端盖组件、电池单体、电池组以及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009087729A (ja) * 2007-09-28 2009-04-23 Toshiba Corp 密閉型電池
CN201259901Y (zh) * 2008-08-25 2009-06-17 武汉银泰科技电源股份有限公司 一种铅酸蓄电池电池盖极柱孔
CN201975435U (zh) * 2010-09-26 2011-09-14 龚纹孝 电极引出密封结构
CN203150627U (zh) * 2013-01-18 2013-08-21 宁德新能源科技有限公司 动力电池顶盖及包含该顶盖的动力电池
CN210110860U (zh) * 2019-09-11 2020-02-21 宁德时代新能源科技股份有限公司 顶盖组件与二次电池

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PL3944405T3 (pl) 2024-03-11
EP3944405A4 (fr) 2022-07-27
EP3944405B1 (fr) 2023-10-18
ES2967894T3 (es) 2024-05-06
EP3944405A1 (fr) 2022-01-26
US20220045392A1 (en) 2022-02-10
FI3944405T3 (fi) 2024-01-09
HUE064674T2 (hu) 2024-04-28
CN210110860U (zh) 2020-02-21
CN113412553A (zh) 2021-09-17

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